Base Class Undefined
ATL / WTL / STL
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A long time ago I came up with a bunch of COM interfaces that were all defined in one IDL file. I created a number of COM objects that supported those interfaces by having the object's IDL file include the first idl file. It worked. All was well with the world. Now, I am trying to make some changes, so I created a Ixxxx2 interface that inherits from Ixxxx in that first IDL file. When I try to get my ATL object to inherit from Ixxxx2 I get compiler error C2504, base class undefined. I've compiled the new version of the IDL file. The new interface is defined exactly the same in the .h file as all the other older interfaces. What am I doing wrong? Thanks, Tim